Question

我为insert，update，delete和select编写了单个存储过程。程序是：

ALTER PROCEDURE [dbo].[artdetails1]
(
    @artdetailId int,
    @artDescription varchar(50),
    @artShortdesc varchar(50),
    @artValidity varchar(50),
    @artStatus varchar(50),
    @StatementType varchar(50)

)

AS
BEGIN
  BEGIN
    IF @StatementType = 'Insert'
        BEGIN
            INSERT INFOartdetails(artDescription,artShortdesc,artValidity,artStatus)
                values(@artDescription,@artShortdesc,@artValidity,@artStatus)   

        END

    IF @StatementType = 'Select'
        BEGIN
            SELECT * FROM artdetails
        END 

    IF @StatementType = 'Update'
        BEGIN
            UPDATE artdetails SET
                artDescription=@artDescription,artShortdesc=@artShortdesc,
                artValidity=@artValidity,artStatus=@artStatus
                where artdetailId= @artdetailId
        END

    ELSE IF @StatementType = 'Delete'
        BEGIN
            UPDATE artist SET @artStatus= 'not available';
        END
  END
END

但我对如何检查C＃代码中的语句类型并调用此过程感到困惑。请帮忙。我是SQL的新手。

Answer 1

首先，你应该 NOT 在一个程序中执行选择和更新。您应该有单独的插入，更新，选择和删除过程。

但是，这是你如何从C＃调用插入过程：

创建连接
创建命令
添加参数
执行命令
捕获结果（如果适用）

示例代码：

using(var conn = new SqlConnection(connString) 
{
    using(var cmd = new SqlCommand("artdetails1", conn)
    {
        cmd.CommandType = CommandType.StoredProcedure;

        cmd.Parameters.AddWithValue("@artdetailId", detailID);
        cmd.Parameters.AddWithValue("@artDescription", description);
        cmd.Parameters.AddWithValue("@artShortdesc", shortDesc);
        cmd.Parameters.AddWithValue("@artValidity", validity);
        cmd.Parameters.AddWithValue("@artStatus", status);
        cmd.Parameters.AddWithValue("@StatementType","Insert");

        conn.Open();
        cmd.ExecuteNonQuery();  // No output to capture for an `INSERT`
    }
}

Answer 2

存储过程调用示例（假设您正在使用SQL服务器）。对于一切都有一个存储过程是一个例外，好的程序员是一个懒惰的规则：

  using(var conn = new SqlConnection(@"Server=.\SQL2008;Database=foo;Integrated Security=true")) {
    var cmd = new SqlCommand("[dbo].[artdetails1]", conn);
    cmd.Parameters.Add("@StatementType", SqlDbType.VarChar, 50).Value = "Insert";
    // set all other parameters
    cmd.CommandType = CommandType.StoredProcedure;
    conn.Open();
    cmd.ExecuteNonQuery();
  }

Answer 3

从c＃调用存储过程的基本过程概述如下。

String connstr = @"Data Source=myserverName;Initial Catalog=myCatalogName;Integrated Security=True";
String statementType = "Select"; //just an example

SqlConnection conn = new SqlConnection(connstr);
SqlCommand cmd = new SqlCommand();
SqlDataReader reader;

cmd.CommandText = "StoredProcedureName";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Connection = conn;
cmd.Parameters.Add("artdetailId", SqlDbType.Int).Value = 1;
cmd.Parameters.Add("@artDescription", SqlDbType.VarChar).Value = "myArtDescription";
cmd.Parameters.Add("@artShortdesc", SqlDbType.VarChar).Value = "myArtShortDesc";
cmd.Parameters.Add("@artValidity", SqlDbType.VarChar).Value = "myArtValidity";
cmd.Parameters.Add("@artStatus", SqlDbType.VarChar).Value = "myArtStatus";
cmd.Parameters.Add("@StatementType", SqlDbType.VarChar).Value = StatementType;

sql conn.Open();

if StatementType = "Select" {
reader = cmd.ExecuteReader();
// Use DataReader to access the data here.
)
else if StatementType = "Insert" || StatementType = "Update" || StatementType = "Delete"
rowsAffected = cmd.ExecuteNonQuery();
}

注意：代码未经过测试。

如何在asp.net中调用存储过程

3 个答案: